JP5788902B2 - Conveyor system for conveying objects and immersion treatment system having such a conveyor system - Google Patents

Description

  The present invention is a conveyor system for transporting objects, in particular: (aa) a chassis supporting at least one load bearing wheel that can be rotated about a rotation axis; and (ab) a pivot axis. Along with (a) at least one conveyor transport and (b) at least one load-bearing wheel, comprising an attachment device that can be pivoted to the center and to which at least one object can be attached The present invention relates to a conveyor system for transporting a vehicle body in an immersion treatment system having a traveling guide rail and (c) a driving means for moving a conveyor transport section along the guide rail.

  The invention further comprises (a) at least one immersion tank that can be filled with a processing fluid in which the object to be processed, in particular the vehicle body can be immersed, and (b) transferring the object to be processed to the immersion tank. And a conveyor system that can be taken out of the immersion tank after being moved into the immersion tank and moved out of the immersion tank.

  There are many load bearing wheels in this commercially known type of system used in car body immersion treatment systems, for example as shown in US Pat. There, the pivot axis of the mounting device is arranged away from the load bearing wheel. The chassis is prevented from inclining about the horizontal axis in the direction perpendicular to the transport direction by the corresponding opposite wheel pressed against the guide rail from below.

German Patent Application No. 102004024614

  With this arrangement, depending on the position of the attachment device and the object attached thereto and the force acting on the chassis, the at least one load bearing wheel may move somewhat away from its running surface and leave. This reduces the contact pressure of a particular wheel on the running surface and considerably reduces the contact pressure required for sliding the wheel, especially when starting up or braking the conveyor transport. This adversely affects the overall and specific driving force as acceleration or braking force.

  Accordingly, it is an object of the present invention to provide a conveyor system and immersion treatment system of the type described at the beginning that takes these problems into account.

  In a conveyor system of the type described at the outset, this object is achieved by (d) the rotation axis of the at least one load bearing wheel and the pivot axis of the mounting device being arranged on the same axis.

  Thus, the contact pressure of the load bearing wheel on the guide rail or its associated running surface is accelerated or decelerated regardless of the direction of movement of the conveyor transport and along the guide rail. It has been shown that it can be maintained reliably regardless of whether it is moved at a constant speed.

  Furthermore, the coaxial arrangement of the rotation axis of the load bearing wheel and the pivot axis of the mounting device makes it possible to make the chassis, and thus the conveyor transport unit, relatively compact compared to known conveyor transport units. .

  It is preferred if the pivot axis of the mounting device is defined by a rotation axis supported on the chassis at the first end.

  In this case, the rotation axis can advantageously support the load bearing wheel.

  It is actually possible for the conveyor transport part to comprise a plurality of load bearing wheels. However, if such a chassis supports only one load-bearing wheel, a particularly compact configuration can be achieved.

  Suitably, the second end of the rotating shaft may be conveyed passively. In this case, the second end of the rotating shaft may support the second load bearing wheel, for example, but then it cannot be associated with the chassis.

  When the load bearing wheel is driven, each conveyor transport can be individually controlled and moved.

  For example, if a chain conveyor is used as the drive, this is not easy.

  It is preferred if the pivot axis of the mounting device is the first pivot axis and the mounting device is further pivoted about a second pivot axis spaced from the first pivot axis. This improves the freedom of movement of the object being processed.

  If the mounting device has a drive that pivots about the first pivot axis and / or about the second pivot axis, a continuous movement sequence can be realized when guiding objects through the immersion tank It becomes.

  It is particularly preferred if the drive device is configured such that the attachment device can pivot independently of each other about the first pivot axis or about the second pivot axis. The movement sequence of the objects can thus be adjusted individually, in the field conditions and / or in the conditions of the objects to be processed.

  The object mentioned above is achieved by an immersion treatment system of the type described at the outset, wherein (c) the conveyor system is constituted by claims 1 to 9.

  The advantages of an immersion treatment system designed in this way correspond in analogy to the advantages described above in connection with the conveyor system.

  Exemplary embodiments according to the invention are described in detail below with reference to the figures shown.

It is a top view of the conveyor conveyance part of the conveyor system for conveying a vehicle body, and is used with an electrophoretic dip coating system. It is a fragmentary sectional view of the conveyor conveyance part from the arrow direction II of FIG. It is a fragmentary sectional view of the conveyor conveyance part of FIG. FIG. 4 is a cross-sectional view of the conveyor transport unit along section line IV-IV in FIG. 2. It is sectional drawing of the conveyor conveyance part along the cutting line VV of FIG. 2 expanded in dimension. FIG. 5 is a diagram corresponding to FIG. 4 of a deformed conveyor transport unit.

  In FIG. 1, the electrophoretic dip coating system schematically illustrated is indicated generally at 2. This was filled with liquid paint 6 by a known method until a specific fluid level (shown only in FIG. 2 and shown as 6a) (schematically shown in broken lines in FIGS. 1 and 2). A) dipping tank.

  The dip coating system 2 is used to paint the car body 8 of the illustrated exemplary embodiment, the car body 8 being shown in a very simplified manner only in FIG.

  The electric field is generated by a method known per se between the vehicle body 8 to be painted and the anode arranged along the movement path of the vehicle body 8, but is not shown for the sake of clarity. In this electric field, the pigment particles contained in the paint 6 move to the vehicle body 8 and adhere thereto. The details of this procedure are generally known, so no further details will be described here.

  The car body 8 is guided by the conveyor system 10 so as to pass through the dip coating system 2, in particular the dip tank 4 and the paint 6 arranged there. To achieve this objective, the conveyor system 10 comprises a rail system 12 comprising guide rails 14 and running rails 16 extending parallel to each other along the immersion tank 4 on the opposite side.

  A plurality of conveyor transport units 18 that respectively receive the vehicle body 8 and can be moved independently in the direction of the arrow 20a or in the direction of the opposite arrow 20b travel along the rail system 12 (see FIG. 1).

  The conveyor transport 18 comprises a chassis 22 having a bottom plate 24 to which two mutually spaced support sides 26, 28 are mounted, perpendicular to the bottom plate 24 and to each other and to the transport direction 20. Extending in parallel.

  For clarity, some components shown in both FIGS. 2 and 3 have reference numerals only in FIG.

  The support sides 26, 28 hold the slide bearings 30, 32, respectively, coaxially with each other in the corresponding inner circle, and the slide bearing is then configured as a hollow shaft and rotated about its longitudinal axis 36. The resulting rotating shaft 34 is supported. To achieve this purpose, one end 38 of the rotating shaft 34 is configured as a shaft coupling piece complementary to the slide bearings 30, 32.

  A load-bearing wheel 40 that can be rotated around the rotating shaft 34 in the circumferential direction by the ball bearing 42 is disposed in a region between the support side surfaces 26 and 28. Therefore, the rotation axis 44 of the wheel 40 and the rotation axis 36 of the rotation shaft 34 are arranged on the same axis so as to coincide with each other. The rotation axis 36 and the rotation axis 44 are shown only in FIGS.

  The wheel 40 rotates along the upper running surface 48 of the guide rail 14 over the bottom plate 24 through the through hole 46.

  The length of the rotating shaft 34 is such a length that extends from the chassis 22 beyond the entire width of the immersion tank 4. At its second end 50, away from the chassis 22, the rotating shaft 34 supports a non-driving roller 52 that rotates along the upper running surface 54 of the running rail 16. The load bearing wheels 40 and rollers 52 have equal outer diameters so that the rotating shaft 34 extends horizontally when the upper running surfaces 48 and 54 of the guide rail 14 and the running rail 16 extend in a common horizontal plane.

  As shown in FIGS. 2 and 3, the guide rail 14 is configured with an I-shaped cross section, and the upper horizontal cross section plate 56 defines an upper running surface 48 and an opposite lower running surface 58. In order to stabilize the chassis on the guide rail 14, the bottom plate 24 is rotatable about a vertical axis, and is paired with two pairs each pressed against the side surface of the cross-sectional plate 56 of the guide rail 14 along the side surface. The formed side guide wheels 60a and 60b are supported. The bottom plate 24 further supports a pair of counter pressure wheels 62 that can rotate about the horizontal axis and press against the lower running surface 58 from below, and the chassis 22 is tilted about the rotation axis 44 of the wheel 40. Is prevented.

  The load bearing roller 40 is driven by an electric motor 64 and is coupled to the electric motor by a chain 66 shown in FIG. To accomplish this purpose, a toothed ring 68 that cooperates with the chain 66 is attached to the side of the load bearing wheel 40. In addition, for example, a belt driving unit can be provided.

  The rotating shaft 34 is configured as a hollow cross section and also supports two pivot arms 70 and a pivot arm 72 that extend radially from the rotating shaft 34 and extend in parallel to each other. The pivot arm 70 and the pivot arm 72 have respective passages (not shown) between the inside of the rotary shaft 34 and the inside of the pivot arm 70 and the pivot arm 72, and are rigid to the rotary shaft 34. Are combined.

  The pivot arm 70 spaced apart from the rotating shaft 34 and the free end 70a or the free end 72a of the pivot arm 72 are articulated and coupled to pivot lugs 78, 80 by drivable stub shafts 74, 76, respectively. Yes. The ends 78 a, 80 a of the pivot lugs 78, 80 spaced from the stub shafts 74, 76 are joined together by a transverse crossbar 82 that extends parallel to the rotating shaft 34. The transverse crossbar 82 which rigidly supports the mounting device 84 in the form of two parallel extending support columns 86, 88 on which the car body 8 is painted is mounted with or without a conveyor skid known per se. Can do.

  Since the rotation shaft 34 is rotatable about its rotation axis 36, the rotation shaft 34 is a coupling lever 90 that extends radially outward from the rotation shaft 34 in the region of the chassis 22 of the conveyor transport unit 18. It is tightly coupled to. The end 90a of the coupling lever 90 spaced from the rotary shaft 34 is coupled to a spindle 92 of a spindle driving unit 94 known per se. The spindle 92 can be extended or retracted relative to the spindle housing 96. Depending on whether the spindle 92 of the spindle drive 94 is extended or retracted, the rotary shaft 34 is coupled to the spindle 92 by the coupling lever 90, resulting in one direction about its rotational axis or Rotate in the opposite direction.

  Here, the pivot arms 70 and 72 are also pivoted together with the attachment device 84 about the rotation axis 36 of the rotation shaft 34.

  Accordingly, the rotation axis 36 of the rotating shaft is also the first pivot axis of the mounting device 84 at the same time.

  The maximum angle at which the pivot arms 70, 72 and the attachment device 84 can be pivoted about the pivot axis 36 depends on the length of the spindle 92 of the spindle drive 94. The longer this is, and the more it can be extended from the spindle housing 96, the greater the maximum pivot angle.

  There is a further internal shaft 98 that extends inside the rotary shaft 34 and is mounted coaxially and rotatably there by a ball bearing 100. The inner shaft 98 extends to the outside of the shaft coupling piece 38 of the rotating shaft 34 and supports the gear 102 at its free end.

  This is coupled by a chain 104 (partially shown in FIGS. 4 to 6) to an electric motor 106 that can rotate the inner shaft 98 about the longitudinal axis in both possible directions. Here, it is also possible to provide a belt driving unit.

  Due to the internal region of the rotary shaft 34 and the pivot arms 70, 72, the stub shafts 74, 76 are internally connected in a manner known per se so that the rotation of the internal shaft 98 causes an associated rotation of the stub shafts 74, 76. Coupled to the shaft 98. If necessary, additional gear between the inner shaft 98 and the stub shafts 74, 76 may be used to increase or decrease the speed of the rotational movement of the inner shaft 98.

  Thus, when the inner shaft 98 is rotated by the electric motor 106, it causes an associated rotation of the stub shafts 74, 76 and thus a pivoting rotation of the pivoting lugs 78,80. Overall, the attachment device 84 is pivoted about the second pivot axis 108 thus defined by the stub shafts 75, 76.

  Thus, as a result of independent drive, i.e., spindle drive 94 and electric motor 106, rotating shaft 34 and inner shaft 98 can be rotated independently of each other. This allows the attachment device 84 to be pivoted about the pivot axis 36 or the pivot axis 108 as independent centers, with the pivot axis 36 and the pivot axis 108 as the centers for simultaneous pivoting. It is also possible to pivot.

  Overall, therefore, the conveyor system 10 is defined by a translational movement, a first pivoting movement about the first pivoting axis 36 formed by the rotation axis 36 of the rotating shaft 34, and stub shafts 75, 76. It is possible to realize a movement sequence of the vehicle body formed by combining the second pivotal motion around the second pivotal axis 108.

  Only the translational movement of the vehicle body, only the pivoting movement about the first pivot axis 36, only the pivoting movement about the second pivot axis 108, or two of these movements in each case performed Combinations are possible.

  When the coupling lever 90 protrudes in a common plane, it forms a predetermined angle with the pivot arms 70, 72, which in an exemplary embodiment according to the invention is 90 °, FIG. Reference numeral 110 of 6 is shown. When the spindle 92 is retracted as far as possible into the spindle housing 96, the pivot arms 70, 72 can be considered to have their free ends 70a, 72a in their highest position. This is shown in FIG. The vertical position of the running surface 48 of the guide rail 14 can be used as a reference height, for example.

  The maximum reached height of the free ends 70a, 72a of the pivot arms 70, 72 can be adjusted by the angle 110 formed by the coupling lever 90 and the pivot arms 70, 72.

  FIG. 6 shows, for example, a modification of the conveyor transport unit 18 in which the angle 110 is smaller than 90 ° and only about 65 °. As clearly shown by comparison in FIG. 4, the free ends 70a, 72a of the pivot arms 70, 72 are now connected to the running surface 48 of the guide rail 14 when the spindle 92 is retracted as far as possible into the spindle housing 96. It is structured higher in relation to.

Claims (9)

A conveyor system,
a) at least one conveyor transport (18) comprising: aa) a chassis (22) supporting at least one load bearing wheel (40), which can be rotated about a rotational axis (44); and ab) a conveyor transport (18) comprising an attachment device (84) which can be pivoted about a pivot axis (36) and to which at least one object (8) can be attached;
b) a guide rail (14) along which the at least one load bearing wheel (40) travels;
c) In the immersion treatment system (2) having the drive means (64) for moving the conveyor transport section (18) along the guide rail (14), the object (8), particularly the vehicle body (8), In a conveyor system for transporting,
d) the rotation axis (44) of the at least one load bearing wheel (40) and the pivot axis (36) of the attachment device (84) are arranged on a coaxial line with each other ;
The pivot axis (36) of the attachment device (84) is a first pivot axis (36), and the attachment device (84) is spaced apart from the first pivot axis (36). Conveyor system characterized in that it can be further pivoted about two pivot axes (108) .   The pivot axis (36) of the attachment device (84) is defined by a rotating shaft (34) attached to the chassis (22) at a first end (38). The conveyor system according to 1.   The conveyor system according to claim 2, characterized in that the rotating shaft (34) supports the load bearing wheel (40).   The conveyor system according to claim 3, characterized in that the chassis (22) supports only one load-bearing wheel (40).   The conveyor system according to any one of claims 2 to 4, wherein the second end (50) of the rotating shaft (34) is conveyed passively.   The conveyor system according to any one of claims 1 to 5, characterized in that the load bearing wheel (40) is driven. By having a drive device (90, 92, 94, 102, 104, 106), the mounting device (84) can move the first pivot axis (36) and / or the second pivot axis (108). The conveyor system of claim 1, wherein the conveyor system can be pivoted to the center. The drive devices (90, 92) such that the attachment device (84) can be pivoted independently of each other about the first pivot axis (36) or about the second pivot axis (108). , 94, 102, 104, 106). Conveyor system according to claim 7, characterized in that a) at least one immersion tank (4), which can be filled with a processing fluid (6) into which the object to be treated (8), in particular the vehicle body (8), can be immersed;
b) The object to be treated (8) is moved to the immersion tank (4), moved into the immersion tank (4), and moved to the outside of the immersion tank (4), and then the immersion tank. A conveyor system (10) that can be removed from (4),
c) An immersion treatment system in which the conveyor system (10) is constituted by any one of claims 1-8.

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